| Message ID | 1471250179-24198-1-git-send-email-lftan@altera.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Mon, Aug 15, 2016 at 04:36:19PM +0800, Ley Foon Tan wrote: > Altera PCIe IP can be configured as rootport or device and they might have > same vendor ID. It will cause the system hang issue if Altera PCIe is in > endpoint mode and work with other PCIe rootport that from other vendors. > So, add the rootport mode checking in link retrain fixup function. > > Signed-off-by: Ley Foon Tan <lftan@altera.com> > --- > drivers/pci/host/pcie-altera.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/pci/host/pcie-altera.c b/drivers/pci/host/pcie-altera.c > index 58eef99..6477738 100644 > --- a/drivers/pci/host/pcie-altera.c > +++ b/drivers/pci/host/pcie-altera.c > @@ -139,6 +139,9 @@ static void altera_pcie_retrain(struct pci_dev *dev) > u16 linkcap, linkstat; > struct altera_pcie *pcie = dev->bus->sysdata; > > + if (!pci_is_root_bus(dev->bus)) > + return; It seems like it would be more direct to check for "pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT"? > if (!altera_pcie_link_is_up(pcie)) > return; > > -- > 1.8.2.1 > -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Fri, Aug 19, 2016 at 4:18 AM, Bjorn Helgaas <helgaas@kernel.org> wrote: > > On Mon, Aug 15, 2016 at 04:36:19PM +0800, Ley Foon Tan wrote: > > Altera PCIe IP can be configured as rootport or device and they might have > > same vendor ID. It will cause the system hang issue if Altera PCIe is in > > endpoint mode and work with other PCIe rootport that from other vendors. > > So, add the rootport mode checking in link retrain fixup function. > > > > Signed-off-by: Ley Foon Tan <lftan@altera.com> > > --- > > drivers/pci/host/pcie-altera.c | 3 +++ > > 1 file changed, 3 insertions(+) > > > > diff --git a/drivers/pci/host/pcie-altera.c b/drivers/pci/host/pcie-altera.c > > index 58eef99..6477738 100644 > > --- a/drivers/pci/host/pcie-altera.c > > +++ b/drivers/pci/host/pcie-altera.c > > @@ -139,6 +139,9 @@ static void altera_pcie_retrain(struct pci_dev *dev) > > u16 linkcap, linkstat; > > struct altera_pcie *pcie = dev->bus->sysdata; > > > > + if (!pci_is_root_bus(dev->bus)) > > + return; > > It seems like it would be more direct to check for > "pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT"? Okay, will change in next version. > > > if (!altera_pcie_link_is_up(pcie)) > > return; > > > > -- > > 1.8.2.1 > > -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/pci/host/pcie-altera.c b/drivers/pci/host/pcie-altera.c index 58eef99..6477738 100644 --- a/drivers/pci/host/pcie-altera.c +++ b/drivers/pci/host/pcie-altera.c @@ -139,6 +139,9 @@ static void altera_pcie_retrain(struct pci_dev *dev) u16 linkcap, linkstat; struct altera_pcie *pcie = dev->bus->sysdata; + if (!pci_is_root_bus(dev->bus)) + return; + if (!altera_pcie_link_is_up(pcie)) return;
Altera PCIe IP can be configured as rootport or device and they might have same vendor ID. It will cause the system hang issue if Altera PCIe is in endpoint mode and work with other PCIe rootport that from other vendors. So, add the rootport mode checking in link retrain fixup function. Signed-off-by: Ley Foon Tan <lftan@altera.com> --- drivers/pci/host/pcie-altera.c | 3 +++ 1 file changed, 3 insertions(+)